Plumbing Contractor Permit Requirements in Davenport, IA

Complete permit and license guide for starting a plumbing contractor in Davenport, Scott County, Iowa.

Verified 2026-09-03 5 stops $400–$1,200 est. 4–10 weeks to obtain all licenses
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Not legal advice. Requirements may change — always verify with your local government authority before applying. Key agencies and fees on this page were re-checked against official government sources on .

Federal — start here

1 stop

  1. EIN (Employer Identification Number)

    Required if you have employees or operate as an LLC or corporation. Free from the IRS.

    Official government source

    FreeImmediate (online application)

State of Iowa

1 stop

  1. Iowa Department of Revenue — Sales Tax Permit

    Required for businesses selling taxable goods or services in Iowa. The state rate is 6%, and local option sales tax of up to 1% may apply. Iowa taxes about 75 enumerated services, so check whether your service is taxable before assuming you need a permit. Register with the Iowa Department of Revenue online.

    Official government source

    Free — no fee to register for a sales tax permitRegister online through GovConnectIowa, the state's tax portal

City of Davenport / Scott County

3 stops

  1. Iowa DIAL — Plumbing Contractor License

    Plumbing contractors in Iowa are licensed by the Plumbing & Mechanical Systems Board within the Department of Inspections, Appeals, and Licensing, successor to the former Division of Labor after the 2023 consolidation. License levels run apprentice, journeyperson, master, and contractor; a contractor license must be paired with a contractor registration, and the two are submitted in one application. Licenses run on a three-year cycle that ends June 30 of year three, with fees prorated for mid-cycle applicants.

    Official government source

    $400 for a full three-year cycle for a contractor ($250 license + $150 registration); master $240, journeyperson $180 per cycle; $35 exam approval and $25 paper application fees where applicableThree-year license cycle; renew by June 30 of the final year — late fees start August 1 and you may not work after September 1 without renewing

  2. No General Business License Required in Davenport

    Davenport does not require a general, citywide business license. The Revenue Division licenses only specific categories, each with its own fee: alarm businesses ($50-$100), auctioneers ($150), billboards and signs, bicycles ($5), tobacco/nicotine ($25-$100 by term), closing-out sales, vehicle-related businesses, mobile food units ($55), live entertainment ($50), metal recyclers ($300), and pawnbrokers/secondhand/junk/antique dealers ($50-$500). Most professional and personal-service businesses — pest control, barbering, tutoring, insurance, cleaning, photography — are not licensed by the city at all. Check the category list, and call the Revenue Division at 563-326-7715 if unsure.

    Official government source

    $0 for most business types; listed categories carry their own published feesNot applicable unless your activity is one of the listed categories

  3. Davenport Plumbing Permit (per project)

    Each plumbing job in Davenport needs its own permit, pulled with the city's Building and Land Development office, and inspections are required at completion. Applications and plans go through the city's electronic plan review system, with a paper route still available for simpler projects. Scott County does not permit work inside the city limits.

    Official government source

    Charged from the city's building and land development permit fee schedule, based on the scope of workSimple trade permits are typically issued within a few business days; inspections follow as work progresses

Terminus

Open for business — est. $400–$1,200 · 4–10 weeks to obtain all licenses

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Official Sources

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